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Couple two transient studies: Using transient flow field in transport simulation
Posted Nov 12, 2014, 11:24 a.m. EST Fluid & Heat, Computational Fluid Dynamics (CFD), Chemical Reaction Engineering Version 4.3, Version 5.2 2 Replies
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it would be very kind if someone could help me (I spent several hours trying to find a solution).
I want to use the results of study 1 (time-dependent flow field) in study 2 (time-dependent transport of diluted species).
Coupling via "Values of Variables not solved for" does not work, in my opinion it's only possible to use specific point in times or a stationary solution. Since my flow field changes in time, this is not an option (if I use "t" as an "interpolated" Time, I get the message " Unknown model parameter").
I don't want to solve flow and transport simultaneously because I want to "play" with the transport. And solving the flow field takes quite a while (>2d), while transport converges quite fast.
I found this topic and Ivar refers to an even older post - but I couldn't find it (i searched quite some time).
www.comsol.com/community/forums/general/thread/34108/
Thank you very much!
Florian
Hello florian
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Compare study 1 and study 2: one computes both physics in one study step, the other uses a single study step.
Best,
Jeff
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This is a rather old thread, but I thought I'd post a model I just built that illustrates how to set this up. It may be useful to someone in the future.
Compare study 1 and study 2: one computes both physics in one study step, the other uses a single study step.
Best,
Jeff
excuse me, I am very appreciated to it that you offer me a solution to use on step`s result to another step.
But I wonder that how to insert the result of first step into second result circularly. Following are details.
I study MHD.The rectangle pulse has a frequency of 0.5ms, and I want to use a period result and insert it into CFD module to calculate 2s. If I follow your advise, I need to calculate EM module 2s and then calculate CFD 2s. Now, I want to calculate EM 0.5ms, and then calculate CFD 2s, which results from the EM module can be sent into CFD module every 0.5ms.
what can i do??
Thank you!